Revolving flagpole truck



Marr. 20, 1923. 1,448,825

L. P. BOLANDER REvoLvING FLAGPOLE TRUCK Filed oct. '51, 1922 (jwoantoz Lau/,s Pia. Bol ndez! latented Mar., Z0, 1923. i

tease ELNT LOUIS PH. BOLANDER; 0F SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO L. PH. BOLANDER & SON, OF SAN FRANCISCO, CALIFORNIA, A FBM COMPOSED 0F SAID L. PH. BOLANDER AND' ALVIN E. BOLANDER.

nnvonvine rrneronn TRUCK.

Application filed ctoeer 31,1922. Serial No. 598,174.

.7b @U '107mm it may concern:

Be it known that l, Louis PH. BoLANnnR, a citizen of the United States, residing at Flan Francisco, in the county of San Francisco and State et California., have invented .new and useful Improvements in Revolving Flagpole Trucks, of which the following is a specification. y

The invention relates to a revolving 'Hag pole truck. The object of the presentinvention is to improve the constructirm` oi revolving` flag pole trucks` and to previde a simple practical and eiiicient flag pole truck of strong, durable and comparatively ineXpensive construction equipped with a ball bearing adapted to reduce to a minimum the friction incident to the rotary movement of a flag pole truck.

A furtherobject of the invention is to provide a revolving flag pole truck of this character in which the weight will be sus tained by a single relatively `large ball and in which provision will be made i'or enablingthe rota-ry truck member to be lifted ott' the Hag pole without liability of displacing the ball.

With these and other objects in view the invention consists in the construction and novel comibination and arrangement of parte hereinafter fully described,illustrated in the accompanying drawings and pointed out in the claims hereto appended. it being understood that various changes in the term` proportion and minor details of construction7 within the scope of the claims, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings, in which like characters of reference designate corresponding parts in the several views Figure 1 is a plan view of a revolving flag pole truck constructed in accordance with this invention7 the arm and the sheave housing and the sheave being in section.

Figure 2 is a central vertical sectional view of the same, taken longitudinally of the arm and the sheave housing.

Figure 3 is a central transverse sectional view through the sheave housing, illustrating the manner of mounting the shaft.

.ln the accompanying drawing, in which is illustrated the preferred embodiment of the invention, the revolving flag pole truck comprises in its constructionja .fixed cap 1 constructed of suitable meta-l and adapted to be itted on the upper endof a flag pole and consisting of a slightly tapered approximately cylindrical portion and a horizontal top portion 2, provided with a projecting horizontal peripheral fiange 8 and having a cent-ral threaded opening et for the recept-ion of the lower threaded end 5 of `a vertical stem 6. The vertical stem 6 extends upwardly from the fixed cap 1 and is smooth above the lower threaded terminal portion and is provided at its upper'end withv a concave seat 7 for the reception of a relatively large. anti-friction supporting ball S, which is arranged within a tubular member 9. The tubular member 9, which consists of a pipe, is exteriorly threaded at its upper and lower end portions 10 and 11 and it is counter-bored or reamed out interiorly from its upper end to a point adjacent the upper end of the stem to forml an interior shoulder 12, which is loca-ted below the Vhorizontal diameter of theball 8 and which is adapted to torma stop or seat for the same to prevent the ball from dropping' out of the `tubular member 9 should the latter and the rotary truck member 14 be removed trom the stem 6. The tubular member 9 has secured 'within its upper portion an approximately cylindrical plug 15 provided in its lower end face with. a recess orconcavity 16 forming a bearing at the topv of the ball 8 and seated upon the same. The plug 15 is secured within the tubular member by a transverse opening 17 which is riveted at its ends to retain it in position but any other suit-` able means may, of course, be employed for securing the plug within the upper portion of the tubular member 9. By constructing the interior of the tubular member in this manner a strong andv substantial bearing is provided for the revolving truck member 14 and the ball is prevented from becoming Adisplaced when the tubular member 9 and the revolving truck member are removed from the stem 6.

The upper exterior end 10 of the tubular member 9 is adapted to receive a ball and the lower threaded end 11 of the said tubular member 9 is screwed into a threaded portion 18 of a central opening in the re- .a fixed flagpole cap provided volving truck member and the lower portion of the centra-l opening of the revolving; truck member is counter-bored to receive a ball bearing comprising-inner and outer annular race members 19 and 20 and anti-triction balls 2l, which are arranged in annular grooves 'or races 22 and 23 formed in the opposed faces of the race members 'la anal 20. The ball bearing eliminates friction due to lateral strain on the revolving` pole truck member and the weight to which the truck member is subjected is sustained by the large ball 8, which insures long;- lite and freedom `oi" movement to the flag' pole truck.

Therevolving truck member is provided at oneside with a projecting arm or poi'- tion 24, which is termed into a sheave housing 25 closed at the top and side and'end wallsy and open at the bottom and receiving' a halyard sheave 26, which' is mounted en arsheavepin 27. The sheave is Lerom/'ed at its periphery and is adapted to receive flag halyard in the usual manner. The revolving truck member is held against accidental upward movement or displacement by means ofvscrews 2 8Hwhich pierces the lower skirt portion of the 'revolving truck member and `extends beneath the horizontal peripheral flange y3 ot the fixed cap, clearly' illustrated in Figure 2 of the drawings.

W'hatl is claimed is :e

l. Avrevolvingllag pole truckcoinprisine Y at the top with a'horizontally-projecting peripheral flange, a central stem rising from theired cap, a revolving' truck member having` a central opening through .which the lstem passes., said truck. member being titted over the cap in spaced relation with the saine `and tendino below the said peripheral flange, a remova. le fastening device piercing' the .lower portion olf the truckl member and -tendingbeneath the said. fla-nge to prevent displacement of the truck memberT a tubular member secured to the revolving truck inem.-

`my hand.

ber and extending upwardly therefrom and receiving the said stem, and upper and lower bearings lfor the truck member and the tubular member detachably retained in place the said fastening device. c l

2. A revolving flag pole tr lcir .comprising a centrally projectingl stem, "a revolving vtruck member haviirg` a central opening through which the stem passes, a tubular member se cured in the upper portion or" the opening rof the truck member and receiving the stem and arranged in spaced relation with the same and provided at its upper portieri with an interior pluve a relatively large ball arranged within the tubular member and ininterior enlarged at the. upper portionto form an interior Vseat or stop located adjacent the upper end of the stem, a relatively large ball arranged withinthe tubular member and litted in' the said bearing seat or 'the stem and having its center located above the said interior shoulder, and aplug` secured within' the upper portionA of the tubular member and having a concavity in its lower end, forming a' bearing seat vand tt'ed' on the said ball whereb)T the revolving truck member and the tubular'meinberare Sup- `ported by the ball.

In testimony whereof I have hereunto set Louis rn. BoLADiiR. 

